Hi Sudheer, It's not a records.config entry it's a stat that is persisted to records.config. HostStatus loads and deserializes the text into a struct kept in a hash table on startup.
On Thu, Apr 16, 2020 at 3:56 PM Sudheer Vinukonda < sudheervinuko...@yahoo.com> wrote: > We don't use this, so I'm not opposed to the proposed change particularly > if it means adding more capability :) > > However, I do have one comment/concern - can we explore using a different > config format to be less error prone/more readable? It seems a bit too > complex and easily error-prone to have to encode the entire config into a > records.config string. Perhaps, a separate config file or part of one of > the existing config files and yaml or json format might be easier on the > eye? > > Just my 2c! > > Thanks, > > Sudheer > > On Thursday, April 16, 2020, 02:08:08 PM PDT, John Rushford < > jrushf...@apache.org> wrote: > > > Greetings, > > With ATS 8.1 I would like find out if a change in the host status metric > from ATS 8.0 can be made. Host status is new with 8.0 and I suspect not > many are using it yet so, we would like to make a change to the metric in > 8.1. > > The host status metrics are used in ATS by parent selection and > traffic_ctl to report and determine if a parent is available for use. A > user may use the 'traffic_ctl host' command to mark a parent as up or down > for use by parent selection and that hosts status is then kept in a > metric. For example in ATS 8.0 a metric could be: > > *host_status.192.168.1.1 1. * > > the metric prefix "host_status" followed by a host name or IP and it's > current state: > 0 = unavailable > 1 = available. > > In ATS 8.1 more features would be added to support health checking, > downtime, and more. In order to serialize the state I've used this new > metric format: > > *proxy.process.host_status.69.252.41.66 > HOST_STATUS_UP,ACTIVE:UP:0:0,LOCAL:UP:0:0,MANUAL:UP:0:0,SELF_DETECT:UP:0* > > This new format serializes the state of a host with reason codes and the > times that they were marked down and the state is loaded across restarts. > This format and the feature change is used in ATS 9.0 and was cherry-picked > into the new 8.1 branch. Details regarding use of this feature are here: > https://docs.trafficserver.apache.org/en/latest/appendices/command-line/traffic_ctl.en.html?highlight=host%20status#cmdoption-traffic-ctl-host-arg-status > > I would like to see if the community is agreeable to this metric and > feature change from 8.0 to 8.1. > > thanks > John Rushford > jrushf...@apache.org > -- John Rushford jjrushf...@gmail.com
